内蒙古陈巴尔虎旗八大关铜钼矿岩石地球化学特征及U-Pb、Re-Os年龄
Geochemical characteristics of rocks and U-Pb, Re-Os age of the Badaguan Cu-Mo deposit in Chen Barag Banner,Inner Mongoli
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摘要: 得尔布干成矿带是中国东北地区中、俄、蒙毗邻区域一条重要的铜、钼、金、铅锌多金属成矿带，控制产出大量多金属矿床。满洲里—陈巴尔虎旗一线集中产出铜钼矿，如乌奴格吐山铜钼矿、八大关铜钼矿、八八一铜钼矿。然而与相邻俄罗斯额尔古纳—上黑龙江—岗仁成矿带中的铜钼矿产出现状对比，无论数量还是规模均相差甚远，显示仍存在较大找矿空间。在近年来大量野外地质工作及矿床实际考察基础上，阐述了八大关铜钼矿矿床地质特征。通过岩石地球化学特征研究、LA-ICPMS锆石U-Pb及辉钼矿Re-Os年龄测试，确定八大关铜钼矿为形成于印支晚期（205.8±3.4Ma），受八大关短轴背斜及NE-SN向断裂控制的造山带斑岩型铜钼矿。与乌奴格吐山铜钼矿对比，八大关矿区形成于燕山早期的花岗质斑岩体极有可能是新的铜钼赋矿体。Abstract: The Derbugan metallogenic belt, which controls lots of molymetalic deposits, is an important Cu-Mo-Au-Pb-Zn molymetalic metallogenic belt in the China-Russia-Mongolia border area. Cu-Mo deposits, such as Wunugetushan, Badaguan, Babayi, are concentrated in Manzhouli and Chen Barag Banner. However, there is big ore-prospecting space in the area whether in number or in scale compared with Cu-Mo deposits in the Erguna-Upper Heilongjiang-Gangren metallogenic belt in adjacent Russia. On the basis of field geological work and investigation of the Badaguan deposit, the authors investigated geological characteristics of the deposit. On the basis of studying rock geochemical data (major elements, trace elements and REE), LA-ICP-MS U-Pb dating of zircon and Re-Os dating of molybdenite, the authors hold that the Badaguan Cu-Mo deposit is a porphyry Cu-Mo deposit related to orogenic belt and was formed in Late Indo-Chinese epoch(205.8±3.4Ma)and controlled by Badaguan short-axis anticlines or NE-SN faults. A comparison with the Wunugetushan Cu-Mo deposit shows that granite-porphyry generated in Early-Yanshanian period is probably a new type of ore-bearing rock in the Badaguan ore district.
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[1] 朱群,武广,张炯飞,等.得尔布干成矿带成矿区划与勘查技术研究进展[J].中国地质,2001,28(5):19-27.
[2] 陈志广,张连昌,万博,等.内蒙古乌奴格吐山斑岩铜钼矿床低Sr-Yb型成矿斑岩地球化学特征及地质意义[J].岩石学报,2008,24(1):115-128.
[3] 谭钢.内蒙古乌奴格吐山斑岩铜钼矿床成矿作用研究[D].中国地质科学院硕士学位论文,2011.
[4] 谭钢,常国雄,佘洪全,等.内蒙古乌奴格吐山斑岩铜钼矿床辉钼矿铼-锇同位素定年及其地质意义[J].矿床地质,2010,29(增刊):506-508.
[5] 赵明玉,王大平,田世良.得尔布干成矿带中段八大关-新峰山成矿地质条件分析[J].矿产与地质,2002,16(2):70-73.
[6] 王喜臣,邓军,刘金英.中国北部得尔布干成矿带构造演化与成矿作用[J].地球学报,2000,21(3):227-235.
[7] Yuan H L,Gao S,Liu X M,et al.Accurate U-Pb age and trace element determinations of zircon by laser ablation inductively coupled plasma mass spectrometry[J].Geostandard Newsletter:The Journal of Geostandards and Geoanalysis,2004,28:353-370.
[8] Andersen T.Correction of common lead in U-Pb analyses that do not report 204Pb[J].Chemical Geology,2002,192:59-79.
[9] Ludwig K R.Users manual for Isoplot/Ex(rev.2.49):a geochronological toolkit for Microsoft Excel[J].Berkeley Geochronology Center,Special Publication,2001,1:55.
[10] 杜安道,何红蓼,殷宁万,等.辉钼矿的铼-锇同位素地质年龄测定方法研究[J].地质学报,1994,68(4):339-347.
[11] 杜安道,赵敦敏,王淑贤,等.Carius管溶样和负离子热表面电离质谱准确测定辉钼矿铼-锇同位素地质年龄[J].岩矿测试,2001,20(4):247-252.
[12] Sun S S,Mcdonough W F.Chemical and isotope systematics of oceanic basalts:implications for mantle composition and processes[J].Geological Society London Special Publication,1989,42:313-345.
[13] McDonough W F,Sun S S,Ringwood A E,et al.Potassium,rubidium,and cesium in tehe Earth and Moon and the evolution of the Earth's mantle[J].Geochimica et Cosmochimica Acta,1992,56(3):1001-1012.
[14] 周建波,曾维顺,曹嘉麟,等.中国东北地区的构造格局与演化:从500Ma到180Ma[J].吉林大学学报(地球科学版),2012,42(5) 1298-1316.
[15] 张炯飞,权恒,武广,等.东北地区中生代火山岩形成的构造环境[J].贵金属地质,2000,9(1):33-38.
[16] 张兴洲,马玉霞,迟效国,等.东北及内蒙古东部地区显生宙构造演化的有关问题[J].吉林大学学报(地球科学版),2012,42(5):1269-1285.
[17] 尹志刚,张跃龙,杨晓平,等.大兴安岭北部中生代火山岩特征及岩浆演化[J].世界地质,2006,2(25):120-128.
[18] 李诺,陈衍景,赖勇,等.内蒙古乌奴格吐山斑岩铜钼矿床流体包裹体研究[J].岩石学报,2007,23(9):2177-2188.
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